Bearing Monitoring And Conditioning System; Bearing On-Site Maintenance - Edwards nEXT730D Instruction Manual

Download the latest documents from edwardsvacuum.com/HSForms/, follow the
procedure in HS1, fill in the electronic HS2 form, print it, sign it, and return the signed
copy to us.
NOTICE:
If we do not receive a completed HS2 form, your equipment cannot be serviced.

12.2 Bearing monitoring and conditioning system

To ensure maximum reliability and bearing life nEXT pumps have an integrated system to
manage the bearing condition. The status is indicated by a blue LED on the pump.
The pumps have an integrated battery-backed real time clock that is constantly
monitoring pump storage time.
The TMP motor controller when powered uses its processor and when unpowered the
real time battery backed clock to monitor the TMP inactivity time. Inactivity time refers
to both when the TMP is unpowered and when the TMP is powered but at rest. When
inactivity time exceeds:
▪ the pre-defined period of 12 months, a bearing conditioning is required and
"Bearing Run in Mode" (BRIM) will commence at the next pump start.
▪ the pre-defined period of 3 years, a bearing replacement is required. The customer
will be alerted by the major service due indicator on the STATUS LED (yellow) and
on the Bearing LED (blue). Once the bearing is replaced and the major service
reset, a bearing conditioning will be required and will commence at the next pump
start.
When the BRIM process completes, the TMP runs to full speed and normal TMP process
can resume.
You can check the TMP inactive time (storage duration) and reset BRIM status via:
▪ TIC – browsing to the „Service menu", „Brg Inactive" will display the TMP inactive
time. See TIC user manual for more details
▪ nST2 – See nST2 user manual for more details.
The purpose of recording the inactive bearing time is to maximize the life of the installed
ball bearing. If the bearings are inactive for a long time, the homogeneity of the grease
distribution deteriorates, which leads to short-term local overheating of the grease in
the bearing when the pump is directly started up to nominal speed. This can lead to
decomposition or evaporation of the grease. This grease is then no longer available for
the running time of the bearing and ultimately leads to earlier failure of the ball bearing.
The Bearing Run In Mode (BRIM), on the other hand, restores the homogeneity of the
grease distribution by gently restarting the pump.

12.3 Bearing on-site maintenance

The bearing of the nEXT pump can be serviced on‑site by any service engineer trained by
us.
The following service tool kits and service parts are available.
B8J200880_D
300812671_002_C3
B8J200880_D - Service
Page 106 08/2021 - ©Edwards Limited